Door construction



March 11, 1941. I w, KE L 2,234,259

DOOR CONSTRUCTION Filed Jan. 23,1939, 2 Sheets-Sheet 1 ATTORNEYS.

March 11, 1941. w. D. KELLY 2,234,259

DOOR CONSTRUCTION Filed Jan. 25, 1939 2 Sheets-Shee t 2 Gog n Nlllllllllllllllil' v mom L9 Wallz avrz l7 ATTORNEY5.

Patented Mar. 11,1941

William D. Kelly, Western Springs, 111., assignor to Stewart-WarnerCorporation, Chicago,v 11]., a corporation of Virginia ApplicationJanuary as, 1939, Serial'No. 252,330

6 Claims.

The present invention relates to a new and improved door constructionand more particularly to a construction of means for guiding andcontrolling the opening and closing movement or I the like;

My invention may be used with any door construction but is particularlyadapted for use with doors of stoves or refrigerators or other unitshaving doors of considerable thickness. In such units it is oftendesirable for reasons of design that'the edges of adjacent doors be inclose proximity. This may be desired merely for appearance or inorder'to provide a minimum of fixed structure between adjacent openings.One specific application of the invention is in connection with a stoveoven door which is located immediately above a grill door, the oven doorswinging down from the top.

It is an object of the present invention to provide anew and improveddoor construction for swinging doors.

It is a further object to provide a door supporting structure forcontrolling the swinging movement of doors with particular reference to25 the movement of that'edge ofthe door maintained adjacent the'fixedstructure to which the door is secured.

It is an additional object to provide a structure of this characteradapted for use with doors 30 of substantial thickness used adjacentsimilar doors or set into the fixed structure.

It is also an object to provide a construction which is simple indesign, composed oi. but few parts and adapted for commercial productionand 35 use.

Other and further objects will description proceeds.

I have shown a preferred embodiment of my invention in the accompanyingdrawings in which- Figure 1 is a fragmentary vertical elevation showingthe construction with the parts in closed appear as the position in fulllines and in open position in broken lines; Figure 2 is a'plan view ofthe construction;

and r Figure 3 is a vertical section taken on line 33 of Figure 1. I

The supporting stove structure is shown gen- 50 erally at II, and alower door 12 is shown, this door being mounted in any suitable mannerand closing a chamber below the oven which is closed bythe doorconstruction shown in detail herein. The oven door It is provided withthe inner wall I4 and the intumed edge I! located adja- ,cent the faceii of the oven structure. The fixed guide or cam arm I l is secured tothe lateral edge wall l8 of the door by means of the machine'screws ItThis arm has an arcuate portion 20 extending between the upper stoproller 5 2| and the lower guide roller 22, this arm being formed withupper and lower cam surfaces engaging the two rollers. The arm I! isfurther provided withthe hooked portion 23 adapted to engage the stoproller 2| with the parts in open 10 position as indicated in brokenlines in Figure 1. The rear face of the hooked portion 23 of the arm I!-is provided with the opposed cam surfaces 24 and 25. These are adaptedto engage the latch rollers 26. These rollers 26 are carried 15 by thelatch slide 21 which passes through the slide holder 28 and is heldin-position by pin 29 passing through the end of the member 21. Thecompression spring 30 is fitted around the member 21 and bears againstthe shoulder 3| so v as to normally thrust the latch rollers forwardlytoward the door. The hook link 32 has a fixed pivot 33 upon the ovenside wall and its opposite end is provided with the pivot 34 securedtothe lateral edge wall I 8 of the door at the point adjacent its loweredge.

As best shown in Figures 2 and 3, the guide roller 22 is provided uponeach side with the washers 35 and 36 so as to maintain the arm' I! inbearing'relation upon the roller. The roller and washers are supportedon the pivot 31 and are held in place by the U-pin 38 which is snappedinto place in a groove in the supporting pivot. The stop roller 2! isalso supported on a pivot 39 carried by the oven wall, and the roller isheld on the pivot by a U-pin 40 snapped upon the pivot. As will beapparent from Figures 2 and 3, the door is preferably provided withthese guide arms and hook. linkconnections at both sides of the door.The parts are duplicates and 40 the supporting pivots merely extend inopposit directions from the oven wall.

The position of the parts in the open and closed position is clearlyshown in Figure 1. With the -parts in the closed position, as shown infull lines, when the upper edge of the door I3 is pulled to the left toopen it,- the arms H, which are rigidly fixed to the door, move over theguide rollers 22 and this causes the door to lift, due -to the fact thatthe lower edge of the arcuate portion 20 of the arm 11 is not on acircular arc having the lower edge of the door for a center, but on acurve having centers spaced farther away from the arm than the loweredge of the door. As the door is swung forward, the

, of the stove construction.

roller 22,- cause the lower edge to swing upwardly so that it fullyclears the upper edge of the lower adjacent door l2. The stop roller 2|in addition to serving as a stop in the final open position,alsopreventsthe arm H from lifting off the roller 22 in the earlierstages of the opening movement. The upper edge of the arcuate vportion20 of the arm H H such as to maintain contact with the roller 2| isformed upon a curve throughout the opening and' closing-movement of thedoor. h

It will be apparent that the first portion of the opening movement isresisted by the engagement of the latch roller 26 against the camsurface 24. The roller rises onthis cam, however,

compressing the spring 36, and as the roller passes over the pointbetween cam surfaces 24 and 25, the door is released forfree openingmovement. When the door is swung in the reverse direction the parts takea reverse movement,.the arms I'l being guided by the rollers 2| and 22.'As thedoor approaches closed position the cam surface 25 thrusts thelatch rollers 26 against the springs 30 and the springs are compresseduntil the rollers 26 pass over against the cam surface 24, whencompression is only partially released so that the springs and rollersserve to hold the door firmly in closed position.

The combined swinging and lifting movement imparted to the lower edge ofthe door by its linked connection to the oven permitsthis lower edge tobe located closely adjacent other portions of the stovewhich projectoutwardly as far as the outer face of the door. a The adjacent portionsmay be a similar door to a broiler or warmingoven or the like, or maybe' a fixed portion It will lie-understood that the doors of moderntypes of stoves are of substantial thickness to permit of the door beingprovided with insulation.

While I have shown one preferred form of construction by way of example,the device may be modified to meet varying conditions and requirementsand I contemplate such changes and variations as come within the spiritand scope of the appended claims.

I claim: p

1. Support construction for swinging doors comprising a link pivotallyconnected to the door adjacent one edge thereof and connected to fixeddoor supporting structure, a guide arm rigidly connected 'to anintermediate portion of the door, and guide means associated with thelower side of the arm for lifting movement of the arm and door duringthe opening of the door.

2. Support construction for swinging doors comprising a link pivotallyconnected to the door adjacent 'one edge thereof and connected to fixeddoor supporting structure, a guide arm rigidly connected to anintermediate portion of the door said armhaving cam portions on thelower side thereof, and guide means associated with the cam portions ofthe arm for lifting movement of the armand door during the opening ofthe door.

3. Support construction for swinging doors comprising a, link pivotallyconnected to the door adjacent one edge thereof and connected to fixeddoor supporting structure, a guide arm rigidly connected to anintermediate portion of the door, cam surfaces upon upper and loweredges of the arm, and fixed guide means engaging said cam surfaces forlifting and limiting movement of the door during the opening of thedoor.

4. Support construction for swinging doors of substantial thickness,comprising a link pivotally connected at one end to the door atva pointadjacent but spaced from an edge and the irmer face of the door andconnected at the other end to fixed door supporting structure, a guidearm rigidly connected to an intermediate portion of the door, and guidemeans associated with the arm for guiding movement of the arm and doorto cause the edge of the door adjacent the link connection to'have alifting and swinging movement.

5. Support construction for swinging doors of substantial thickness,comprising a link pivotally connected at one end to the door at a pointadjacent but spaced from an edge and the inner face of the door andconnected at the other endto fixed door supporting structure, a guidearm rigidly connected to an intermediate portion of the door, said armhaving upper and lower cam surfaces, and guide rollers associated withthe arm engaging the upper and lower cam surfaces for guiding movementof the arm and door to cause the edge of the door adjacent the linkconnection to have a lifting and swinging movement. 6. Supportconstruction for swinging doors of substantial thickness, comprising alink pivotally' connected at one end to the door at a point adjacent butspaced from an edge and the inner face of the door and connected at theother end to fixed door supporting structure, a guide arm rigidlyconnected to an intermediate portion of the door, oppositely inclinedcam surfaces on the free end of the arm, spring latch means engagingsaid surfaces, and guide means associated with the arm for guidingmovement of the arm and door to cause the edge of the door adjacent thelink connection to have a lifting and swinging movement.

" WILLIAM D. KELLY.

